MDCAT XI Physics Work Power And Energy Online Test-2

471

Created on June 19, 2025 By

📚 Test Details

Subject: Physics
Class: 1st year / XI
Chapter Name: Work Power and Energy
Test: 2
Book: Sindh Textbook
Total No. Of MCQs: 50 MCQs
Time Allowed: 50 Minutes

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Price: Free

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1 / 47

1. A body moving with velocity v acted by force f as shows in diagram,calculate power of body

a) 6W

b) 8W

c) 12W

d) 18W

2 / 47

2. Field in which workdone is independent pf path is called

a) Gravitational field

b) Constant field

c) Conservative field

d) None of these

3 / 47

3. Work is:

a) Scalar quantity

b) Vector quantity

c) Tensor quantity

d) Cant be determined

4 / 47

4. Workdone is zero if

a) No force acts

b) No distance is covered

c) Force and distance are perpendicular to each other

d) All of these

5 / 47

5. A body moving with uniform velocity on the ground covers 10 m in 2 seconds. The work done by the body is...

a) Positive

b) Negative

c) Zero

d) Cant be determined

6 / 47

6. Power can be measure by calculating

a) Slope of work time graph

b) Slope of force velocity graph

c) Area of force velocity graph

d) Both a and b

e) Both a and c

7 / 47

7. In which of the following cases, workdone is not zero

a) Body moving with uniform velocity on ground

b) Body moving with uniform velocity against gravitational field

c) Body moving under action of electromagnetic force

d) Body moving under action of centripetal force

e) None of these

8 / 47

8. Area under force and displacement graph gives

a) Work

b) Power

c) momentum

d) All of these

9 / 47

9. Accuracy of workdone by variable force increases with_________

a) Increasing n

b) Decreasing Δ x

c) Decreasing n

d) Both a and b

e) Both b and c

10 / 47

10. A ball attached to a string is rotating around a circle with a radius of 2 m. A force of 5 N is acting on the ball towards centre of circle. How much work is done on the ball?

a) 20j

b) 2π j

c) 20 π J

d) None of these

11 / 47

11. A force OF 20N displacement a body about 3 m,if workdone on body throughout motion is 70J ,What will be the possible reason?

a) Air resistance is acting on body

b) These is friction on path of body

c) Many other normal forces are acting on body

d) Body is acted by multiple force

12 / 47

12. workdone against gravitational force is

a) always negative

b) always positive

c) either positive or negative depending on direction of gravitational force

d) cant be determined

13 / 47

13. A person weighing 700 N runs up a staircase consisting of 15 steps, each with a height of 0.2 m. How much work is done by the person?

a) 0.21KJ

b) 2 KJ

c) 2.1 KJ

d) 21 KJ

14 / 47

14. if kinetic energy of body is increase by 4 times,momentum will be increased by

a) 2 times

b) 4 times

c) 8 times

d) momentum will remain same

15 / 47

15. workdone by gravitational field on body falling downward is

a) negative

b) positive

c) either positive or negative depending on direction of gravitational force

d) cant b determined

16 / 47

16. work done is independent of

a) distance factor

b) force factor

c) time factor

d) none of these

17 / 47

17. An object thrown upward is moving with velocity v,how The height covered by object depends on velocity

a) Height covered by object directly proportional to v

b) Height covered by object i is inversely proportional to v

c) Height covered by object is directly proportional to v ²

d) Height covered by object is inversely proportional to v²

18 / 47

18. A body of 1 kg is moving with a velocity of 5 m/s. A force of 2 N is applied to the body. After 2 seconds, what is the change in the kinetic energy of the body?

a) 12.5j

b) 28j

c) 40.5j

d) Cant be determined

19 / 47

19. Energy can not be produced_______

a) by using any other thing

b) Without using any other thing

c) By producing any other thing

d) Without producing any other thing

20 / 47

20.

In a gravitational field, the work done along a closed path is always...?

a) Equal to area under graph

b) Maximum

c) Zero

d) Cant be determined

21 / 47

21. Workdone by friction is

a) Negative work

b) Positive work

c) Negative or positive depending on direction of movement of object

d) Cant be determined

22 / 47

22. What kind of energy does a flying bird have?

a) Kinetic energy

b) Potential energy

c) Both Kinetic and potential energies

d) None of these

23 / 47

23. Choose the correct statement

a) Electrostatic force do work on charged bodies but electromagnetic force do zero work

b) Electromagnetic force do work on charged bodies but electrostatic force do zero work

c) Both electrostatic and electromagnetic forces do work on charged bodies

d) Both electrostatic and electromagnetic forces do zero work on charged bodies

24 / 47

24. A body is thrown vertically upward,at highest point it possesses

a) Only kinetic energy

b) Only potential energy

c) Both kinetic and potential energies

d) Cant be determined

25 / 47

25. A body is acted upon by a force $F$ . It initially covers 10 m in 2 seconds, and then covers another 10 m in 5 seconds. Choose the correct statement.

a) Workdone during initial 10m in 2sec is more

b) Workdone during final 10m in 5sec is more

c) Work is same in both cases

d) Cant be determined

26 / 47

26. A truck with a mass of 2000 kg is moving at a speed of 20 m/s. When the brakes are applied, it covers a distance of 10 m from the initial point. How much force is required to stop the truck?

a) 2000N

b) 30000N

c) 40000N

d) 50000N

27 / 47

27. Workdone is independent of

a) Force

b) Distance

c) Angle between force and distance

d) Frame of reference

e) None of these

28 / 47

28. Ability to do work called

a) Power

b) Energy

c) Momentum

d) Both a and b

e) All of these

29 / 47

29. If a body of mass 2 kg is initially at rest and starts moving with an acceleration of 2 m/s², what is its momentum after 5 seconds?

a) 5 kgm/s

b) 10kgm/s

c) 20kgm/s

d) 0 kgm/s

30 / 47

30. Workdone on a body can be equal to

a) Change is kinetic energy

b) Change is potential energy

c) Change is elastic potential energy

d) All of these

31 / 47

31. Which energy is conserved when a body falls under action of gravity?

a) Kinetic energy

b) Potential energy

c) Total energy

d) All of these

32 / 47

32. Calculate workdone is lifting a body of weight of 50N ,2m above ground

a) 20j

b) 50j

c) 100j

d) 1000j

33 / 47

33. Which force always do work

a) Centripetal force

b) Centrifugal force

c) Deflecting force

d) Electromagnetic force

e) None of these

34 / 47

34. A body of mass 10 kg is placed at a position labeled as 1 m above the ground. If the body is moved 5 m higher from that position, how much work is required?

a) 100 J

b) 200 J

c) 400 J

d) 500 J

35 / 47

35. Escape velocity does not depends on

a) Mass of planet

b) Radius of planet

c) Mass of object to be projected

d) None of these

36 / 47

36. A ball is moving on the ground with a velocity of 7 m/s. The ball stops after 5 seconds due to a force of 0.5 N. How much power is used?

a) 0.5 W

b) 2.5 W

c) 3.5 W

d) 5 W

37 / 47

37. Power is always defined as

a) Dot product of force and time

b) Cross product of force and time

c) Dot product of force and velocity

d) Cross product of force and velocity

38 / 47

38. A box is placed on the ground. If a boy moves this box upward with uniform velocity, then the work done by the boy is converted into what?

a) Kinetic energy of box

b) Potential energy of box

c) Both Kinetic and potential energy of box

d) Cant be determined

39 / 47

39. In which condition workdone is maximum

a) Force acting perpendicular to displacement covered by object

b) Force acting oblique to displacement covered by object

c) Force acting parallel to displacement covered by o object

d) Cant be determined

40 / 47

40. If a force of 25 N is applied to a body and it moves with a velocity of 2 m/s, what power is produced?

a) 12.5 W

b) 25 W

c) 50 W

d) 100 W

41 / 47

41. Power is independent of

a) Force

b) Velocity

c) Time

d) None of these

42 / 47

42. How much power is required to lift a mass of 20 kg to a height of 30 m above the ground in 2 seconds?

a) 2000 W

b) 3000 W

c) 3700 W

d) 5400 W

43 / 47

43. Work is:

a) Dot product of force and displacement

b) Dot product of horizontal component of force and displacement

c) Dot product of horizontal component of force and displacement

d) Cross product of force and horizontal component of displacement

44 / 47

44. A body of mass 1 kg is moving with a momentum of 5 kg·m/s. A force of 2 N is applied to the body for 2 seconds. What is the final kinetic energy of the body?

a) 25J

b) 25.5J

c) 35.5 J

d) 40.5J

45 / 47

45. Rate of change of momentum of a body falling under action of g is equal to:

a) Power

b) Force

c) Weight

d) none

46 / 47

46. A book with a mass of 0.5 kg is placed on a table whose surface is 5 m above the ground. A student comes and places this book on another table which is 10 m high. By how much does the potential energy of the book increase?

a) 10 J

b) 25J

c) 50J

d) 100J

47 / 47

47. Work is said to be done when only

a) Forces acts on body

b) Body covers some distance

c) Energy of body changes

d) All of these

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MDCAT XI Physics Work Power And Energy Online Test-2

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